Slide frame holder for PASCO Optic Bench

I like PASCO Physics products. But I missed something last week.
I used an Optics Bench with Diode Laser and diffraction grating for an experiment with students.
Experiment: Find laser wavelength with diffraction grating.
But I missed an holder for my diffraction grating that are fit into an slide frame from 5x5 cm.
So I made myself.